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Lovat, Simon Fraser, 11th Baron

(Encyclopedia)Lovat, Simon Fraser, 11th Baron lŭvˈət [key], 1675?–1747, Scottish nobleman and Jacobite conspirator. The nephew of the 9th baron, he and his father contested the passing of the title to his cous...

Love, Alfred Henry

(Encyclopedia)Love, Alfred Henry, 1830–1913, American pacifist, b. Philadelphia. Love, a Quaker, remained firm in his principles at the outbreak of the Civil War, refusing even to hire a substitute when he was dr...

Lowell, John, American jurist

(Encyclopedia)Lowell, John, 1743–1802, American jurist, b. Newburyport, Mass. He became (1762) a lawyer and later served in the provincial assembly (1776, 1778), in the state constitutional convention (1779–80)...

Lowell, Percival

(Encyclopedia)Lowell, Percival, 1855–1916, American astronomer, b. Boston, grad. Harvard, 1876; brother of Abbott Lawrence Lowell and Amy Lowell. He visited Korea and Japan, where he acted as counselor and foreig...

artificial intelligence

(Encyclopedia)artificial intelligence (AI), the use of computers to model the behavioral aspects of human reasoning and learning. Research in AI is concentrated in some half-dozen areas. In problem solving, one mus...

low-temperature physics

(Encyclopedia)low-temperature physics, science concerned with the production and maintenance of temperatures much below normal, down to almost absolute zero, and with various phenomena that occur only at such tempe...

LSD

(Encyclopedia)LSD or lysergic acid diethylamide līˌsûrˈjĭk, dīˌĕthˈələmĭd, dīˌĕthəlămˈĭd [key], alkaloid synthesized from lysergic acid, which is found in the fungus ergot (Claviceps purpurea). I...

Lubin, David

(Encyclopedia)Lubin, David lo͞oˈbĭn [key], 1849–1919, American agriculturist, b. Poland. After prospering as a merchant in California, he devoted himself to helping farmers with their problems. Through his eff...

Lucerne

(Encyclopedia)Lucerne lo͞otsĕrnˈ [key], canton (1993 pop. 331,800), 576 sq mi (1,492 sq km), central Switzerland. Drained by the Reuss and Kleine Emme rivers, Lucerne is mainly an agricultural and pastoral regio...

artificial respiration

(Encyclopedia)artificial respiration, any measure that causes air to flow in and out of a person's lungs when natural breathing is inadequate or ceases, as in respiratory paralysis, drowning, electric shock, chokin...